A :\nocF:xE dog froim imarylaxd — berry 161 



that of Merriam compare favorably iu all the outstanding features 

 with but few exceptions. The protoconid of T. helJoggi appears in the 

 illustration to be more rounded than in the present specimen. This 

 may be due to difference in wear. A small tubercle near the base of 

 the metaconid is mentioned in the description of Mi of T . keUocj(ii. 

 This tubercle is absent in the present specimen, but a slight uneven- 

 ness of the enamel in this region, if developed, might have been 

 termed a tubercle. 



Remarkx. — I adopt the current usage of the generic name Toinarc- 

 tus, assuming that Tephrocyon is a synonym. The Maryland form 

 corresponds more closely to members of this group, which in the West 

 are known from the middle Miocene, than it does to the lower 

 Miocene species of Cynodesmus. 



From the scant material at hand it is impossi))le to draw any con- 

 clusions as to the characters or habits of Totnarctiis iitarylandica. It 

 is possilde. however, to enumerate its associates from the other fossil 

 vertebrates found in the Calvert Miocene. The known vertebrate 

 fauna includes Pisces. Chelonia, Crocodilia. Aves, Sirenia, Cetacea, 

 Carnivora. Proboscidea, and Artiodactyla. 



us. GOVERNMENT PRINTING OFFICE: 1938 



